Pedestal-extension-table lock.



PATENTED MARJO, 1903 E. TYDEN.

PEDESTAL EXTENSION TABLE LOGK-.

APPLICATION FILED MAY 31 1902 H0 MODEL.

UNITED STATES PATENT OFFICE.

EMIL TYDEN, OF HASTINGS, MICHIGAN.

PEDESTAL-EXTENSION-ITABLE LOCK.

SPECIFICATION forming part of Letters Patent No. 722, dated March 10, 1903 Application filed May 31, 1902. fierial No. 109,661. (No model.) 1

To all whont it may concern:

Be it known that I, EMIL TYDEN, a citizen of the United States, and a resident of Hast ings, in the county of Barry, State of Michigan, have invented certain new and useful Improvements in Pedestal-Extension-Table Locks, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to pedestal extension-tables, and specifically to the devices therein for locking the pedestal parts together, so as to prevent the tendency to separate at the lower end, which are shown in my pending application, Serial No. 94,748, filed February 19, 1902, as a modification ofa struc ture which is also shown in that application and made the basis of specific claims, said modification herein shown being within the scope of the generic claims of that application and this application being made for the purpose of covering same specifically, as set out in the claims hereof. Y In the drawings, Figure 1 is a side elevation, partly sectional, of a pedestal extensiontable having my improved locking device. Fig. 2 is a section at the line 2 2 in Fig. 1, showing the unclosed position as in Fig. 1. Fig. 3 is a similar section showing the parts of the pedestal slightly separated after the engagement of the locking device, but before they are operated to close up the pedestal. Fig. 4 is a section at the line 4 4 in Fig. 1.

In the drawings, 1 1 are the two members of the table-top.

2 2 are the pedestal members pertaining to the members 1 1, respectively.

3 represents one of the slides of theextension device, to which the bridge 4, connecting it with the corresponding slides, (not shown,) is attached for the purpose of carrying the center leg 5 in the customary manner, according to the familiar construction of extension-tables.

6 is a sleeve on the outside of the center leg, having lugs 7 7 extending up on opposite sides of the bridge 4 at a sufficient distance therefrom to allow some range of oscillation to the sleeve about the center leg. The purpose of these lugs is to afford means for attaching the handle 8, by which the sleeve may be oscillated. At the lower end of the sleeve, which is at a substantial distance below the table-top and may be at any distance within the length of the pedestal, the sleeve has diametrically opposite lugs or brackets 9 9, to which are pivoted links or latches 1O 10, which are provided with springs 11 11, attached to the lugs 9 9, respectively, and acting upon the links or latches, tending to hold them normally trending from their pivots inward toward the axis, but not directly radial, adeviation of about thirty degrees from' the radial direction, one link in one direction and the other in the other direction, from the diametricalline which would connecttheirpiv ots being suitable for the purpose of the action, as hereinafter described. The ends of these links or latches are provided with pivot-studs 13 13, which are adapted to become engaged and to have pivotal action in the angles or pivot-seats formed by the hook projections 14 14 on the ends of the brackets 15 15',which are rigidly secured to the inner walls of the pedestal parts, respectively, at positions substantially opposite with respect to the axis of the center leg and sleeve. When the links trend in normal direction under control of the springs-that is to say, about thirty degrees divergent from radial lines through their respective pivots to the brackets 9 9the pivotstuds 13 13 are in position to engage in the pivot-seats when the sleeve is rotated in the direction of the arrow on Fig. 3, and the rotation being continued to bring the pivots of the links in diametric line with said pivotseats the pedestal parts are drawn together sufficiently to take up the sag which it is the purpose of the invention to cure, and when the pivot of the links is carried a little past the said diametric line it will be evident that the elastic reaction of all the parts which are thus to be drawn closely together and the tendency of the pedestal parts to sag apart will operate to prevent the oscillation back past that diametric line. To prevent further movement in the same direction, which would'let the parts separate again, the pivots 16 on the links project, so as to encounter the brackets 15 15, respectively. Thus the position of the parts drawn together by oscillating the sleeve, as described, becomes secure and stable, and

this may be termed the locked position of the parts.

I claim- 1. In a pedestal extension-table, in combination with the separable members and the pedestal members pertaining thereto respectively, an element mounted so as to be inclosed by the pedestal and rotatable about a vertical axis; links for connecting said rotatable element with the pedestal members respectivel y at a substantial distance below the table-top, said links being pivoted to the rotatable element at opposite sides of its axis, the pedestal members, respectively, having means for pivotally engaging such links; means for holding the links normally yieldingly in position to be thus engaged upon the rotation of the rotatable element heforethe pedestal members are closed to efiect a second pivotal connection of each link; the two pivots of each link when thus connected being out of line with the axis of the rotatable element, and the pivot of each link to the rotatable element being at the opposite side of the other pivot of the link from the axis; whereby the rotation in direction to bring the pivots in line radial to the axis of rotation, forces the pedestal members together; the parts being adapted for such rotation until the pivot of the link to the rotating element passes the line from the axis to the other pivot of said link; means arresting the movement of the link after said line is passed, and means for rotating said rotatable element at will to and from such position.

2. In a pedestal extension-table, in combination with the separable members and the pedestal members pertaining thereto, respectively, an element suitably mounted to be inclosed in the pedestal, rotatable about a vertical axis, and having at a substantial distance below the table-top, projections extending outwardly at opposite sides of the axis; links pivoted to said projections respectively; springs operating on said links, tending to hold them normally trending inward from their respective pivots at acute angles to a diameter which would connect said pivots and at opposite sides of such diameter; hearings on the pedestal members, respectively, extending toward the axis of rotation of said rotatable element, and having studs adapted to be encountered by the links as the rotatable element is rotated when the pedestal members are near together and before they are closed up, the links having hooked ends adapted to form pivot-seats for the studs on the bearings, respectively, when thus encountered; means for rotating the rotatable element after such encounter, and means arresting the rotary movement when the pivots of the links to the projections have passed the radii from the axis of rotation to the bracketstuds respectively.

3. In a pedestal extension-table in combination with the separable members of the table and the pedestal members pertaining thereto, respectively, a sleeve mounted on the center leg adapted to be oscillated thereabout, said sleeve having at a substantial distance below the table-top meansfor engaging the pedestal members by rotation of the sleeve, and devices on the pedestal members, respectively, adapted for engagement by the sleeve when the latter rotates after the pedestal members are near together but before they are entirely closed up; the relative positions and forms of the means carried by the sleeve and the engaging means mounted on the pedestal members, respectively, being adapted to cause such rotation after engagement todraw the pedestal members together.

- 4. In a pedestal extensiontable, in combination with the separable members of the table, and the pedestal members pertaining thereto respectively; a sleeve mounted on the center leg and adapted to be oscillated thereabout; links for connecting said sleeve with the pedestal members respectively at a substantial distance below the table top, each link being pivotally attached to one of the two parts which it is to connect, the other two connected parts having means for pivotally engaging the link to effect such connection; means for holding the links normally in position to be thus engaged upon the rotation of the sleeve when the pedestal members approach but before they are closed; means for rotating the sleeve to effect the second pivotal connection of the links respectively, the two pivots of each link when said second connection is efiected before the pedestal is closed being out of line with the axis of the sleeve, the relative positions of said pivots and axis being such that continued rotation in the direction which effects the second connection brings both pivots in line with the axis.

5. In a pedestal extension-table, in combination with the two separable members of the table, and the pedestal members pertaining thereto respectively; a sleeve mounted on the center leg and adapted to be oscillated or rotated the'reabout; links pivoted to the sleeve at opposite points thereon at a substantial distance below the table-top; springs operating on said links tending to hold them normally trending inward from their pivots respectively at acute angles to a diameter which would connect their pivots and at opposite sides of such diameter; brackets on the pedestal parts respectively extending toward the axis of the sleeve, and having studs adapted to be encountered by the links as the sleeve is rotated when the pedestal parts are near together before they are closed up, the links having hooked ends adapted to form pivotseats for the studs on the brackets respectively when thus encountered; means for r0- tating the sleeve after such encounter; and means arresting the rotary movement when the pivots of the links to the sleeve have passed the radii from the axis of the sleeve to the bracket-studs respectively.

6. In a pedestal extension-table, in combi nation with the separable members of the table, and the pedestal members pertaining thereto respectively; a sleeve mounted on the center leg and adapted to be oscillated thereabout; links for connecting said sleeve with the pedestal members respectively at a substantial distance below the table-top, each link being pivotally attached to one of the two parts which it is to connect, the other of the two parts to be connected having means for pivotally engaging the link to effect such connection; means for holding the links normally in position to be thus engaged upon the rotation of the sleeve when the pedestal members approach but before they are closed; a lever at the upper end of said sleeve, extending off from the sleeve under the table-top toward the margin thereof for rotating the sleeve to efiect the second pivotal connection of the links respectively, the two pivots of each link when said second connection is effected, before the pedestal is closed being out of line with the axis of the sleeve, the relative positions of said pivots and axis being such that continued rotation in the direction which effects the second connection brings both pivots in line with the axis.

7. In a pedestal extension-table, in combination with the separable members of the table, and the pedestal members pertaining thereto respectively; the extension-slides, the

- bridge, and the center leg secured to'such bridge; a sleeve having at the upper end lugs offset and extending up past the bridge at opposite sides thereof, and a lever engaged with said lugs above the bridge and extending off under the table-top toward the margin thereof for rotating the sleeve; links for connecting said sleeve with the pedestal members respectively at a substantial distance below the tabletop, each link being pivotally attached to one of the two parts which it is to connect, the other two connected parts having means for pivotally engaging the links to efiect such connection; means for holding the links normally in position to be thus engaged upon the rotation of the sleeve when the pedestal members approach but before they are closed; means for rotating the sleeve to eifect the second pivotal connection of the links respectively, the relative positions of said pivots and axis being such that continued rotation in the direction which effects the second connection brings both pivots in line with the axis.

8. In a pedestal extension-table, in combination with the separable members of the table, and the pedestal members pertaining thereto respectively; the extension devices and an element carried thereby in position to be inclosed by the pedestal members when they are closed, said element being adapted to be rotated upon avertical axis; links pivoted to said rotatable element at opposite sides of its axis at a substantial distance below the table-top for connecting the same with the pedestal members respectively; means on the pedestal members for engaging the links respectively to elfect such connection; means for holding the links normally in position to be thus pivotally engaged upon the rotation of the rotatable element when the pedestal parts approach but before they are closed; and means for so rotating said element on the two pivotal connections of each link when the second. connection is effected before the pedestal is closedbe out of line with the axis of the rotatable element and their relative positions being such that rotation in the direction which effected said second connection brings them in line with the axis, and means for stopping the rotary movement when the moving pivot slightly passes the line.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, this 12th day of May, 1902.

EMIL TYDEN.

In presence of- FRED W. STEBBINS, KITTIE F. CLARKE. 

